(57) باب وَقْتِ رَكْعَتَىِ الْفَجْرِ
It was narrated that Ibn Umar said:
"Hafsah told me that when dawn glowed, the Prophet (ﷺ) would pray two rak'ahs.
Reference: Sunan an-Nasa'i 1761
In-book reference: Book 20, Hadith 164
English translation: Vol. 2, Book 20, Hadith 1762